单词	nitrogen
释义	nitrogennitrogen /ˈnaɪtrədʒən/ ●●○ noun [uncountable] (symbol N) Etymology ETYMOLOGYnitrogen Origin: 1700-1800 French nitrogène, from nitre ( ➔ NITIC ACID) + -gène producing science, chemistry a gas that is an element, has no color or smell, and is the main part of the Earth’s air
随便看	exasperating exasperatingly exasperation Excalibur excavate excavation excavator exceed exceedingly excel excellence Excellency excellent excellently except excepted excepting exception exceptionable exceptional exceptionally excerpt excess excess demand excessive

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